package com.bit.forum.services.impl;

import com.bit.forum.common.AppResult;
import com.bit.forum.common.ResultCode;
import com.bit.forum.dao.ArticleMapper;
import com.bit.forum.exception.ApplicationException;
import com.bit.forum.model.Article;
import com.bit.forum.model.Board;
import com.bit.forum.model.User;
import com.bit.forum.services.IArticleService;
import com.bit.forum.services.IBoardService;
import com.bit.forum.services.IUserService;
import com.bit.forum.utils.StringUtils;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.Date;
import java.util.List;

@Slf4j
@Service
public class ArticleServiceImpl implements IArticleService {

    @Resource
    private ArticleMapper articleMapper;

    //用户和板块的操作
    @Resource
    private IUserService userService;

    @Resource
    private IBoardService boardService;

    @Override
    public void create(Article article) {
        //非空校验
        if (article == null || article.getUserId() == null || article.getBoardId()==null ||
                StringUtils.isEmpty(article.getTitle()) || StringUtils.isEmpty(article.getContent()) ){
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            throw  new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        //设置默认值
        article.setVisitCount(0);  //访问数
        article.setReplyCount(0);  //回复数
        article.setLikeCount(0);   //点赞数
        article.setDeleteState((byte) 0);
        article.setState((byte) 0);
        Date date = new Date();
        article.setCreateTime(date);
        article.setUpdateTime(date);
        //写入数据库
        int articleRow = articleMapper.insertSelective(article);
        if (articleRow <= 0){
            log.warn(ResultCode.FAILED_CREATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_CREATE));
        }

        //获取用户发帖数
        User user = userService.selectById(article.getUserId()); //获取用户的信息
        //没有找到指定的用户信息
        if (user == null){
            log.warn(ResultCode.FAILED_CREATE.toString() +", 发帖失败,user id = "+article.getUserId());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_CREATE));
        }
        //更新用户的发帖数
        userService.addOneArticleCountById(user.getId());

        //获取板块发帖数
        Board board = boardService.selectById(article.getBoardId());
        //是否在数据库中有对应的板块
        if (board == null){
            log.warn(ResultCode.FAILED_CREATE.toString() +", 发帖失败,borad id = "+article.getBoardId());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_CREATE));
        }
        //更新板块中帖子数量
        boardService.addOneArticleCountById(board.getId());

        //打印日志
        log.info(ResultCode.SUCCESS.toString() + ", user id = "+ article.getUserId()
                + ", board id = "+article.getBoardId() +", article id = "+article.getId() + "发帖成功");
    }

    @Override
    public List<Article> selectAll() {
        //没有参数,不做非空校验
        List<Article> articles = articleMapper.selectAll();
        return articles;
    }

    @Override
    public List<Article> selectAllByBoardId(Long boardId) {
        //非空校验
        if (boardId == null || boardId<=0){
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        //验证板块是否存在
        Board board = boardService.selectById(boardId);
        if (board == null){
            log.warn(ResultCode.FAILED_BOARD_NOT_EXISTS.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_BOARD_NOT_EXISTS));
        }
        //查询
        List<Article> articles = articleMapper.selectAllByBoardId(boardId);
        return articles;
    }

    @Override
    public Article selectDetailById(Long id) {
        if (id == null || id <= 0){
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }

        //查询
        Article article = articleMapper.selectDetailById(id);
        //判断结果是否为空
        if (article == null){
            log.warn(ResultCode.FAILED_ARTICLE_NOT_EXISTS.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLE_NOT_EXISTS));
        }
        //更新帖子访问次数
        Article updateArticle = new Article();
        updateArticle.setId(article.getId());
        updateArticle.setVisitCount(article.getVisitCount() + 1);
        //保存到数据库
        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if (row != 1){
            log.warn(ResultCode.ERROR_SERVICES.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_SERVICES));
        }
        //更新返回对象的访问次数-还是之前的
        article.setVisitCount(article.getVisitCount() +1);
        //返回帖子详情
        return article;
    }

    @Override
    public Article selectById(Long id) {
        if (id == null || id <= 0){
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        //调用dao
        Article article = articleMapper.selectByPrimaryKey(id);
        return article;

    }

    @Override
    public void modify(Long id,String title,String content){
        if (id == null || id <= 0 || StringUtils.isEmpty(title) || StringUtils.isEmpty(content)){
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        //构建要更新的帖子对象
        Article updateArticle = new Article();
        updateArticle.setId(id);
        updateArticle.setTitle(title);
        updateArticle.setContent(content);
        updateArticle.setUpdateTime(new Date());
        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if (row != 1){
            log.warn(ResultCode.ERROR_SERVICES.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_SERVICES));
        }
    }

    @Override
    public void thumbsUpById(Long id) {
        //非空校验
        if (id == null || id <= 0){
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }

        //获取帖子详情
        Article article = articleMapper.selectByPrimaryKey(id);
        //帖子不存在

        if (article == null){
            log.warn(ResultCode.FAILED_ARTICLE_NOT_EXISTS.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLE_NOT_EXISTS));
        }

        //帖子状态异常
        if (article.getState() ==1 ||article.getDeleteState() == 1){
            log.warn(ResultCode.FAILED_ARTICLE_BANNED.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLE_BANNED ));
        }
        //构建更新的点赞数
        Article updateArticle = new Article();
        updateArticle.setId(article.getId());
        updateArticle.setLikeCount(article.getLikeCount()+1);
        updateArticle.setUpdateTime(new Date());

        //调用dao
        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if (row != 1){
            log.warn(ResultCode.ERROR_SERVICES.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_SERVICES));
        }
    }

    @Override
    public void deleteById(Long id) {
        //非空校验
        if (id == null || id <= 0){
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        //根据帖子id查询信息
        Article article = articleMapper.selectByPrimaryKey(id);
        if (article == null || article.getDeleteState() ==1){
            log.warn(ResultCode.FAILED_ARTICLE_NOT_EXISTS.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLE_NOT_EXISTS));
        }
        //构造更新对象
        Article updateArticle = new Article();
        updateArticle.setId(article.getId());
        updateArticle.setDeleteState((byte) 1);
        //dao
        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if (row != 1){
            log.warn(ResultCode.ERROR_SERVICES.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_SERVICES));
        }
        //更新板块中的帖子数量
        Board board = boardService.selectById(article.getBoardId());
        //是否在数据库中有对应的板块
        if (board == null){
            log.warn(ResultCode.FAILED_CREATE.toString() +", 删帖失败,borad id = "+article.getBoardId());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_CREATE));
        }
        boardService.subOneArticleCountById(board.getId());

        //更新用户发帖数量

        //获取用户发帖数
        User user = userService.selectById(article.getUserId()); //获取用户的信息
        //没有找到指定的用户信息
        if (user == null){
            log.warn(ResultCode.FAILED_CREATE.toString() +", 删帖失败,user id = "+article.getUserId());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_CREATE));
        }
        userService.subOneArticleCountById(user.getId());

    }

    @Override
    public void addOneReplyCountById(Long id) {
        //非空校验
        if (id == null || id <= 0){
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        //获取帖子记录
        Article article = articleMapper.selectByPrimaryKey(id);
        if (article == null ||article.getDeleteState() == 1){
            log.warn(ResultCode.FAILED_ARTICLE_NOT_EXISTS.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLE_NOT_EXISTS));
        }
        //封贴
        if (article.getState() == 1){
            log.warn(ResultCode.FAILED_ARTICLE_BANNED.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLE_BANNED));
        }

        //构造更新对象
        Article updateArticle =new Article();
        updateArticle.setId(article.getId());
        updateArticle.setReplyCount(article.getReplyCount() +1);
        updateArticle.setUpdateTime(new Date());

        //执行
        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if (row != 1){
            log.warn(ResultCode.ERROR_SERVICES.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_SERVICES));
        }
    }

    @Override
    public List<Article> selectByUserId(Long userId) {
        //校验
        if (userId == null || userId <0){
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        //校验用户是否存在
        User user = userService.selectById(userId);
        if (user == null){
            log.warn(ResultCode.FAILED_USER_NOT_EXISTS.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_USER_NOT_EXISTS));
        }
        //DAO
        List<Article> result = articleMapper.selectByUserId(userId);

        return result;
    }
}
